James mcsweeny



No. 610,455. Patented Sept. 6, i698. J. MCSWEENY.

HAND DRILL.

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ATENT Prion.

I JAMES MCSWEENY, OF PITTSFIELD, MASSACHUSETTS, ASSIGN OR ATO THE E. D.JONES dz: SONSCOMPANY, OF SAME PLACE.

HAN D-DRILL.

SPECIFICATION forming partl ofi-Letters Patent No. 61(1),455, datedSeptember 6,v 1898.

Appleman Vfiled Anglia 1o, 1897.

To all whom it may B01/06770:HV

Be it known that I, JAMES MOSWEENY, of Pittseld,in the county ofBerkshire an d State of Massachusetts, have invented a new and ImprovedHand-Drill, of which the following is a full, clear, and exactdescription.

The invention relates ,to hand-drills such as shown and described in theLetters Patent of the United States, No. 573,231, granted to me onDecemberl, 1896. i

The object of the present invention is to provide a new and improved`hand-drilldesigned for use either as a clamp or as a ratchetdrill andarranged to permit the operator to regulate the feed with great accuracyin a very simple manner to preyent breaking of the drills, especiallywhen boring or breaking through the material.

The invention consists of certain parts and details and combinations ofthe same, as will be fully described hereinafter and then pointed out inthe claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in allvthe figures.

Figure l is a side elevation of theimprovement arranged as aclamping-drill and with parts shownvin section. Fig. 2 is a sideelevation of the improvement arranged as a ratchet-drill and withpartsin section. Fig. 3 is an enlarged sectionall side elevation of theholding device for the spindle-nut.A Fig. Il is a perspective View oftheclamping-collar of the holding device, and Fig. 5 is a sectional planview of the device for turning the spindle in either direction.

When the device is used as a clamp-drill, as shown in Fig. 1, I providea suitably-constructed clamp A for fastening the tool to a table B orother support, and in the said clamp A is held vertically adjustable athreaded post C, carrying at its upper end a head D, in which isadjustably held a supporting-rod E. The supporting-rod E is provided atone end with a fork E', in which is hung on trunnions (shown in dottedlines in Fig. 1) a casing F, containinga nut G for a threaded spindle H,carrying a chuck I,` containing a drill I.

On the upper end of the spindle H is keyed or otherwise fastened atoothed wheel J, en-

Serial No. 647,103. (No model.)

gaged by a spring-pressed pawl J', held in a casing J2, mounted torotate loosely on the upper end of the spindle and engaged by a handle J2, under the'control of the operator, for turning the spindle in eitherdirection. This device is more fully shown and described in the patentabove referred to, so that fur thur description thereof is Vnot deemednecessary. .l

` The upper end o f the nut G within the casing F is engaged bythelining K of a split clamping-collar K, formed at its lower` edge with aslot K2, engaged by a lug F in the recessed upper end of the casing F,as is plainly indicated in Figs. 1 and 3, so that the collar isprevented from turning. The lining K is made of brous wood, leather,yorother suitable material to properly clamp the nut G, so as to hold thelatter in place when the 4split collar is closed. For this purposeIlmake part of the outer face of the collar Kjconical. as at K3, andthis face is engaged by a simi-y larly-shaped inner surface L' of a nutL, screwing in the upper. endo'f the casingvF, with the head L2 of thenut extending above the casing, so as to be readily taken hold of by theoperator for screwing the nut down or up in the casing and clamping thecollar K against the nut G to hold the same in place or for allowing thenut. G "to turn loosely in the casing F with thespindle H.

The lower end of thevn'ut G is formed with a head G', containing avball-bearing G2, engagingthelower end of the casing F, the said headextending to the outside of the casing to be conveniently. taken hold ofbythe operator for turning the nut G and the spindle H whenever desired.On the upper end of the nut G screws a retaining-collar G2, the loweredge of which rests on the upper end of the collar K, so as to hold theseveral parts in place within the casing F.

When the nut L is screwed upward to release the collar K from the nut G,then the latter is free to turn with the spindle H in case the drill Imeets with unusual resistance, such as is frequently met with whenboring through the material. that when the nut G turns with the spindleH no feed takes place at thetime, and vthe operator, upon turning thenut by taking hold It is evident IOO of the head G', can sufiicientlyfeed the spindle the material without danger to the drill.

When the nut L, however, is screwed downward, then the split collar K istightly closed upon the nut G, and as the said collar K is held in placein the casing F it is evident that the nut G is locked in positionwithin the casing, and consequently the spindle H when turned screws inthe nut and correspondingly feeds the drill I in the material. If

the resistance to the drill, however, is greater than the clamping powerof' the collar K on the nut G, then the latter will turn with thespindle, so that the feeding is stopped or partly so, to preventbreaking of the drill. This is very essential, especially in drillingsteel and other hard metals, as the drill of ordinary machines is liableto be caught and injured when breaking through the material. With theimprovement describedthe frictionfeed can be instantly thrown off at thetime the point breaks through, and the remainder of the hole can bebored by the operator turning the nut G' by hand with greater or lessrapidity, as the case requires.

By hanging the casingF on trunnions in the fork F. of the rod E thedrill I and spindle H remain in the same position when at work drillinga hole whether the feed is applied to the spindle lightly or heavily.

When using a small-sized drill in soft metal and the feed is appliedlightly, the threaded spindle C and the supporting -rod E will slightlyspring, and when using a large-sized drill boring through hard steel thefriction would have to be applied heavily to force the drill into thesteel, which would cause the threaded post C and the supporting-rod E tospring, so that the spindle H and drill I would be thrown back out ofposition and the spindle H would bind in the nut G, andthe nut G wouldtherefore bind in the casing F, which would make it almost impossible towork the drillingmachine. Therefore the machine would not work if thecasing F did not hang on trunnions, as the binding of the nut G in thecasing F would cause friction so great that the nut G would remainstationary in the cashing F, and therefore the threaded spindle H wouldadvance to its work as fast as the thread on said spindle would allow,which would of course Wreck the drilling-machine provided power enoughcould be applied to drive said machine.

When the device is used as a ratchet-drill, as shown in Fig. 2, then thecasing F is hung on trunnions on a suitable frame E2, and the lower endof the spindle H is provided with the usual ratchet-lever J4 for turningthe spindle. The operation, so far as the feeding is concerned, isexactly the same as that above described in reference to Fig. l.

I do not limit myself to the particular friction device shown anddescribed', as it is evident that other similar devices can beconstructed to accomplish the same purpose.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- 1. A hand-drill comprising a easing, a nutmounted to turn in the said casing, a threaded spindle screwing in thesaid' nut, a split clamping-collar held stationary in the said casingand engaging the said nut, and a second nut in the said casing andengaging the said clamping-collar, to close or open the same,substantially as shown and described.

2. A hand-drill comprising a casing, a nut mounted to turn in the saidcasin g, athreaded spindle screwing in the said nut, a splitclamping-collar held stationary in the said casing and engaging the saidnut, a second nut in the said casing and engaging the saidclamping-collar, to close or open the same, and a retaining-collar heldon the upper end of the spindle-nut, and resting on the clamping-collar,substantially as shown and described.

3. A hand-drill provided with a casing, a spindle-nut mounted to turn inthe said casing, a split clamping-collar held stationary in the casing,and having a lining engaging the said nut, the outer face of the nutbeing made conical, and a conical nut screwing in the said casing, andengaging the said clampin g-collar, to close the same upon thespindlenut, substantially as shown and described.

JAMES MCSWEENY.

Vitnesses:

R. B. BARDWELL, A. E. MALCOLM.

